ASTROSAT CZTI

Data Quality Report

Orbit 20210518_A10_058T04_9000004382_level2

Creation date: 2021-05-19T22:51:28.531551
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1A10_058T04_9000004382cztM0_level2_bc.evt modeM0/AS1A10_058T04_9000004382cztM0_level2_quad_clean.evt
Size (bytes)3,838,795,2001,019,024,640
Size3.6 GB 971.8 MB
Events in quadrant A17,392,9316,935,334
Events in quadrant B38,916,7846,856,873
Events in quadrant C19,422,9956,530,764
Events in quadrant D35,413,9025,388,292

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A015340
B015340
C015340
D015340

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01190
B01190
C01190
D01190

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01608270
B02338890
C01705520
D02719370

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A750938901.185197%
B7509319972.659369%
C7509317912.385043%
D750931622921.611868%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 87179 75097 13 13 0.01% 0.02%
B 87179 75099 65 65 0.07% 0.09%
C 87179 75094 16 16 0.02% 0.02%
D 87179 74853 728 728 0.84% 0.97%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 0 13 729506 806.04 4211 4157 899.9
A 8 192 150974 163.15 4211 4157 899.9
A 13 254 137568 148.25 4211 4157 899.9
B 6 159 20424301 25483.18 4180 4083 801.3
B 0 229 1527980 1901.73 4180 4083 801.3
B 4 171 268896 330.47 4180 4083 801.3
C 3 233 3306213 3576.58 3945 3936 923.3
C 10 22 516666 555.32 3945 3936 923.3
C 0 10 250816 267.39 3945 3936 923.3
D 12 218 12134768 15275.55 3514 3418 794.2
D 13 104 3120845 3925.4 3514 3418 794.2
D 8 195 2751187 3459.94 3514 3418 794.2

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter